The problem of evil is a philosophical dilemma that attempts to reconcile the existence of evil and suffering in the world with the idea of an omnipotent, omniscient, and benevolent God. It questions how such a God could allow the existence of evil and suffering.
The answer "we all have free will" is one of the many possible responses to the problem of evil, but it is not the only one. It is commonly put forth as a theistic response to the problem and is associated with the idea that human beings have been given free will by God, and as a consequence of this freedom, they may choose to commit evil acts.
However, it's essential to recognize that the problem of evil is a complex and multi-faceted issue, and various other responses have been proposed over the centuries. Some of the other answers include:
The greater good defense: This argument posits that God may allow evil and suffering to exist in the world because they serve a higher purpose or contribute to a greater good that we may not fully comprehend.
The soul-making theodicy: This response suggests that the presence of evil and suffering in the world is necessary for the moral and spiritual development of individuals. Overcoming challenges and suffering can lead to personal growth and a stronger character.
The limitations of human understanding: This approach argues that as finite beings, we might not fully understand God's plan or the reasons for allowing evil and suffering to occur.
Pantheism or non-theistic perspectives: In these worldviews, there is no personal God responsible for creation. Instead, the universe is seen as an interconnected whole where good and evil are natural aspects of existence.
The denial of an all-powerful and all-loving God: Some argue that the existence of evil and suffering suggests that an all-powerful and all-loving God does not exist.
The aesthetic argument: Some philosophers have proposed that evil and suffering are necessary for the existence of certain virtues or for the experience of contrasting states, making the world more interesting or beautiful.
The karmic view: Some belief systems, like certain interpretations of Hinduism and Buddhism, assert that suffering and evil are the consequences of past actions (karma).
In summary, while the concept of free will is a common theistic response to the problem of evil, it is not the only possible answer. Different philosophers, theologians, and belief systems have put forth various explanations to address this complex philosophical challenge. Each response has its strengths and weaknesses, and the problem of evil remains an ongoing subject of philosophical and theological debate.